t 
oo 
PALEOZOIC PALEONTOLOGY. 
None of these species has a very definite, stratigraphic value, as all 
of them have a long range in the Ordovician strata, so that they indi- 
cate nothing beyond the Ordovician age of the stratum in which they 
occur. 
Locality 75 B.—This locality is on the hillside, a short distance. 
above the Trenton limestone, Locality 75 A, three-fourths of a mile 
east of Branchville. The fossils were collected in a small quarry 
opening in the slate, and have all been replaced by pyrite, their condi- 
tion of preservation being far from satisfactory. The species recog- 
nized are as follows :* 
. Diplograptus foliaceus (Murch.). 
Diplograptus angustifolius (Hall). 
. Lasiograptus mucronatus (Hall). 
. Corynoides calycularis Nich. 
. Dalmanella testudinaria (Dal.). 
All of these graptolite species occur in the Norman’s Kill shale, near 
Albany, New York, and all except Diplograptus foliacens, which has a 
wide range in the Ordovician formations, are among the characteristic 
species of the Norman’s Kill fauna, and are not known to occur at 
any other horizon. The occurrence of species of this graptolite fauna: 
in New Jersey is of interest, because its exact geologic horizon in: 
New York has been a question of much discussion. Different authors 
have placed the Norman’s Kill shale in the Lorrain, the Utica and 
the Trenton periods of the Ordovician. An able discussion of the 
whole problem connected with the Norman’s Will fauna, with a his- 
torical review of all earher opinions, has been presented by Dr. 
Rudolph Ruedemann,+ of Albany, New York, in a paper entitled 
“Hudson River Beds Near Albany, and Their Taxonomic Equiva- 
lents.” In this paper Dr. Ruedemann has shown that the strata 
bearing the Norman’s Kill graptolite fauna are “homotoxial with a 
part of the middle or lower Trenton limestone.” The occurrence of 
the fauna at Branchville seems to confirm the observations of Dr. 
Ruedemann. The stratum containing the fauna is near the base of 
the Hudson River formation, at an elevation of from fifty to seventy- 
five feet above a ledge of limestone, whose fauna is that of the Para- 
Ct He OO WO 
* The author is greatly indebted to Dr. Rudolph Ruedemann, of Albany, for valua- 
ble assistance in the identification of the graptolites from both this locality and from. 
the locality near Jutland. 
+ Bull. N. Y. State Museum, No. 42, vol. VIII. (1901). 
